Holding pin



FIG. 1 is a front view of a holding pin, showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a bottom view thereof, the top being a mirror image;

FIG. 5 is a perspective view thereof;

FIG. 6 is a reduced perspective view thereof, the broken lines being for illustrative purposes only; and,

FIG. 7 is a front view thereof, the broken lines being for illustrative purposes only. 

The ornamental design for a holding pin, as shown and described. 